Hi Maximiliano !
Thank you for participating in the Small Business support community. My name is Nico Muselle from Cisco Sofia SBSC.
To answer your question, the WRV200 only comes with licences for 10 ipsec clients, and there is no way to expand the number of licences for this device. I'm afraid this is a product hardware limitation to make sure that all concurrent connections are handled correctly.
Hope this answers your question.
Best regards,
Nico Muselle
Sr. Network Engineer - CCNA